22221010221021 has 12 divisors (see below), whose sum is σ = 32097057503680. Its totient is φ = 14813987087880.

The previous prime is 22221010221019. The next prime is 22221010221061. The reversal of 22221010221021 is 12012201012222.

It is a happy number.

22221010221021 is a `hidden beast` number, since 222 + 210 + 1 + 0 + 2 + 210 + 21 = 666.

It is not a de Polignac number, because 22221010221021 - 2¹ = 22221010221019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 22221010220985 and 22221010221003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22221010221001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9384810 + ... + 11511588.

Almost surely, 2^{22221010221021} is an apocalyptic number.

It is an amenable number.

22221010221021 is a deficient number, since it is larger than the sum of its proper divisors (9876047282659).

22221010221021 is a wasteful number, since it uses less digits than its factorization.

22221010221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3287696 (or 3287693 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 22221010221021 its reverse (12012201012222), we get a palindrome (34233211233243).

The spelling of 22221010221021 in words is "twenty-two trillion, two hundred twenty-one billion, ten million, two hundred twenty-one thousand, twenty-one".